Which tune is better?

[RockyIII]

Does anyone have experience with OEM tune (TORS cat removed vs custom tune 20050decel). I currently have the 20050decel tune and think it's great, but was just wondering if anyone has any opinions on this in terms of smoothness, power, etc.

I don't know if anyone has had the same issue as me, but with this new custom tune, when I start the bike, I get the occasional quick hiss sounds which I think is coming from Cyl.3 at the air box point next to the TPS sensor. The engine almost stops at times but it seems to go away after a short while on idle.

Would be interested to know what this is.

Cheers guys.

 

[dougl]

Does anyone have experience with OEM tune (TORS cat removed vs custom tune 20050decel). I currently have the 20050decel tune and think it's great, but was just wondering if anyone has any opinions on this in terms of smoothness, power, etc.

I don't know if anyone has had the same issue as me, but with this new custom tune, when I start the bike, I get the occasional quick hiss sounds which I think is coming from Cyl.3 at the air box point next to the TPS sensor. The engine almost stops at times but it seems to go away after a short while on idle.

Would be interested to know what this is.

Cheers guys.

I've been using this tune since Wayne MacDonald at Tuneboy custom made it and revised the L tables to help with decel popping. This is for a stock under seat filter. I had the bike dynoed at 140 hp, 150 ft lbs quite a few years ago on this tune. Your problem sounds specific to your bike.

This tune unchecks the O2 sensor, which prevents the ECU from using the O2 sensor signal at low throttle. If you are running it with the O2 sensor box unchecked, you need to disconnect the sensor connection on the right side (or remove it completely). I find that the bike is smoother at low throttle in 1st with the O2 sensor connected. I connect it during the cold months and the decel popping isn't bad. However, in the warm months, the popping gets pretty bad so I disconnect the sensor and let the ECU work directly off the L tables at low throttle.

 

[RockyIII]

My comparison complete.

Hi Dougl,

My thoughts are the same. The other day I decided to download the 20226 tune to compare. I started her up and the engine revved sky high and took a while to settle down. I took her out for a spin on the OEM 20226 tune and I immediately noticed less power compared to my previous Wayne decel tune. But the problem wasn't only this, the engine decided to just rev itself and never settle down for some reason which made the bike almost undrivable. When I returned back home, I immediately downloaded Waynes non decel tune to compare the difference between the two options (decel and normal).
I decided to up the idle from 750 to 850.

Now she's back to a healthy fighting machine. I would definately recommend upping the idle on Waynes tune to match the newer OEM tunes, it makes the idle perfect in my opinion.

I will now stay with this tune with upped idle, period. It's such an awesome tune and makes the bike run soooo good.

With my custom exhaust I didn't notice any difference with the decel tune so I stuck with the normal, non decel tune.

I unchecked and disconnected the o2 sensor because there were two error codes relating to this sensor. One was heater circuit or something, so I guess it wasn't working efficiently anyway, could be wrong tho.

As a final note, the non decel tune in my opinion starts the bike better in terms of initial boost on the idle which then quickly settles down to a nice idle.

 

[dougl]

Hi Dougl,

My thoughts are the same. The other day I decided to download the 20226 tune to compare. I started her up and the engine revved sky high and took a while to settle down. I took her out for a spin on the OEM 20226 tune and I immediately noticed less power compared to my previous Wayne decel tune. But the problem wasn't only this, the engine decided to just rev itself and never settle down for some reason which made the bike almost undrivable. When I returned back home, I immediately downloaded Waynes non decel tune to compare the difference between the two options (decel and normal).
I decided to up the idle from 750 to 850.

Now she's back to a healthy fighting machine. I would definately recommend upping the idle on Waynes tune to match the newer OEM tunes, it makes the idle perfect in my opinion.

I will now stay with this tune with upped idle, period. It's such an awesome tune and makes the bike run soooo good.

With my custom exhaust I didn't notice any difference with the decel tune so I stuck with the normal, non decel tune.

I unchecked and disconnected the o2 sensor because there were two error codes relating to this sensor. One was heater circuit or something, so I guess it wasn't working efficiently anyway, could be wrong tho.

As a final note, the non decel tune in my opinion starts the bike better in terms of initial boost on the idle which then quickly settles down to a nice idle.

Triumph increased the idle from 750 to 850 at some point in it's OEM tunes. This didn't make it into the original decel tune but I raised it myself. At the time I had the decel tune dynoed, we also tested the stock 20226 tune. This has the secondaries partially closed. This resulted in a significant loss of torque in the peak torque range (2500-3300 rpm) with a maximum loss of about 13 lb. ft. at 3000 rpm.

 

[warp9.9]

I don't know if anyone has had the same issue as me, but with this new custom tune, when I start the bike, I get the occasional quick hiss sounds which I think is coming from Cyl.3 at the air box point next to the TPS sensor. The engine almost stops at times but it seems to go away after a short while on idle.

Would be interested to know what this is.

Cheers guys.

check air box clamps and throttle body calmps. It a good Idea to check the vac lines and the vac plug caps on the throttle bodies also. there is tow capped ports on the rear throttle body

 

[RockyIII]

13lbs of loss makes sense to me as I can really notice it.

And thanks Warp for the input on that one.

Would it be worth adding an underseat or under tank K&N with Waynes tune? It was designed around a stock filter which I have, so I guess it's better to leave it the way it is. Anyway, any more power and the thing would sprout wings and take off.

 

[dougl]

13lbs of loss makes sense to me as I can really notice it.

And thanks Warp for the input on that one.

Would it be worth adding an underseat or under tank K&N with Waynes tune? It was designed around a stock filter which I have, so I guess it's better to leave it the way it is. Anyway, any more power and the thing would sprout wings and take off.

I use a K&N under seat filter. I don't think it makes much difference whether it's stock or not.

 

[RockyIII]

I'd agree on that, the under tank may well need a slightly different tune, altho I don't know that for sure and I guess the triples is a whole new ball game.

 

[dougl]

I'd agree on that, the under tank may well need a slightly different tune, altho I don't know that for sure and I guess the triples is a whole new ball game.

There's no point in doing the under tank filter. With the older Rocket stock seat, the plastic manifold under the seat directs air from the rear of the seat to the snorkel which fits over the filter. This setup has to be restrictive and if you have that seat, rip out the snorkel manifold so the filter can more freely suck air. I had a Corbin from day one which obviated this issue.